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Editorial Team
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Asked: 2026-05-14T05:35:33+00:00

I am creating a bash script for generating certificates. The openssl command that creates

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I am creating a bash script for generating certificates. The openssl command that creates a certificate asks for keyboard input. This is every time the same sequence of keys: seven times [ENTER] followed by two times [‘y’ + ENTER]. How can I do this programmatically?

Update

I was able to reduce eliminate the required keyboard input using the command line parameters:

  • -config FILE to specify a config file
  • -passin PWD and -passout PWD to specify a password

For more details you can have a look at my experiments. This url is checkout-able with subversion.

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  1. Editorial Team

    One way to simulate user interaction is expect.

    With OpenSSL specifically, you could just write a configuration file that does not require any input for the task you want to perform. (see man 5ssl config)

    For a good example of how to script opennssl, see CACerts CSRGenerator script.

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